<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!-- 搜索结果列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" 
				  v-for="(item, index) in searchResults" 
				  :key="index"
				  @click="gotoDetail(item.goods_id)">
				<view class="goods-name">{{ item.goods_name }}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<view v-if="!isShowClear">
					<uni-icons type="trash" size="17" @click="isShowClear = true"></uni-icons>
				</view>
				
				<view v-else>
					<text class="txt" @click="onClearAll">全部删除</text>
					<text class="txt" @click="isShowClear = false">取消</text>
				</view>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<block v-for="(item, index) in historyList" :key="index">
					<view class="history-item" @click="onHistoryItemClick(item,index)">
						<text class="history-txt" @click="gotoGoodsList(item)">{{ item }}</text>
						<!-- <uni-icons type="clear" v-show="isShowClear"></uni-icons> -->
					</view>
				</block>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 延时器 timeId
				timer: null,
				kw: '', // 搜索关键字
				searchResults: [], // 搜索结果
				isShowClear: false,
				// 搜索关键词的历史记录
				historyList: []
			};
		},
		computed:{
			history() {
				return [...this.historyList ].reverse()
			}
		},
		onLoad() {
			console.log(uni.getStorageInfoSync('kw'));
			this.historyList = JSON.parse(uni.getStorageSync('kw') )|| '[]'
		},
		methods: {
			input(e) {
				// 清除延时器
				clearTimeout(this.timer)
				// 重新启动一个延时器，并把 timerId 赋值给 this.timer
				this.timer = setTimeout(() => {
					this.kw = e
					// console.log(this.kw);
					this.getSearchList()
				}, 500)
			},
			async getSearchList() {
				// 判断关键词是否为空
				if(this.kw === '') {
					this.searchResults = []
					return
				}
				const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
				if(res.meta.status !== 200) return uni.$showMsg()
				console.log(res); 
				this.searchResults = res.message
				// 查询到搜索结构之后，保存搜索关键词
				this.seaveSearchHistory()
			},
			// 点击搜索结果跳转商品详情
			gotoDetail(goods_id) {
				uni.navigateTo({
					url: `/subpkg/goods_detail/goods_detail?goods_id=${goods_id}`
				})
			},
			// 删除全部历史记录
			onClearAll() {
				uni.showModal({
					title: '提示',
					content: '是否删除历史记录',
					showCancel: true,
					success: ({ confirm, cancel }) => {
						// 用户点击了确定
						if(confirm) {
							this.historyList = []
							this.isShowClear = false
							uni.removeStorageSync('kw')
						}
					}
				})
			},
			// 点击历史记录删除指定记录
			onHistoryItemClick(item, index) {
				if(this.isShowClear) {
					this.historyList.splice(index, 1)
				}
			},
			// 保存搜索关键词
			seaveSearchHistory() {
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			gotoGoodsList(item) {
				uni.navigateTo({
					url:`/subpkg/goods_list/goods_list?query=${item}`
				})
			}
		}
	}
</script>

<style lang="scss">
.search-box {
	position: sticky;
	top: 0;
	z-index: 999;
}
.sugg-list {
	padding: 0 5px;
	
	.sugg-item {
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-name {
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
			margin-right: 3px;
		}
	}
}
.history-box {
	padding: 0 5px;
	.history-title {
		display: flex;
		justify-content: space-between;
		align-items: center;
		height: 40px;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
		.txt {
			font-size: 12px;
			padding: 5px;
		}
	}
	.history-list {
		display: flex;
		flex-wrap: wrap;
		.history-item {
			box-sizing: border-box;
			display: inline-block;
			padding: 12px;
			position: relative;
			.history-txt {
				display: inline-block;
				font-size: 12px;
			}
		}
	}
}
</style>
